diff --git a/Dockerfile-bullseye b/Dockerfile-bullseye
index f6a585f..dd949f9 100644
--- a/Dockerfile-bullseye
+++ b/Dockerfile-bullseye
@@ -2,7 +2,7 @@
 # 
 # base layer with perl and some general preparations
 #
-FROM perl:5.36.3-slim-bullseye AS base
+FROM perl:5.40.0-slim-bullseye@sha256:cd90ae98ec01b51bcc873c180ec47dd9253e93e8e811c03ecf18a29d5be50e1d AS base
 
 ARG TARGETPLATFORM
 
@@ -46,7 +46,7 @@ EOF
 # Install all CPAN Modules, needed from FHEM and standard modules
 #
 
-FROM perl:5.36.3-bullseye AS build-cpan 
+FROM perl:5.38.0-bullseye@sha256:0e532e15d319b5140d7b81fe2f92f0dfb76e1ae071afd96647bd80955a3d4881 AS build-cpan 
 
 COPY cpanfile /usr/src/app/core/cpanfile
 
diff --git a/Dockerfile-threaded-bullseye b/Dockerfile-threaded-bullseye
index 1c44232..ec7678f 100644
--- a/Dockerfile-threaded-bullseye
+++ b/Dockerfile-threaded-bullseye
@@ -2,7 +2,7 @@
 # 
 # base layer with perl and some general preparations
 #
-FROM perl:5.36.3-slim-threaded-bullseye AS base
+FROM perl:5.40.0-slim-threaded-bullseye@sha256:31991f45e6e298966923674bf110516b83d58fe2f7ec6c6d3244352543c566ed AS base
 
 ARG TARGETPLATFORM
 
@@ -46,7 +46,7 @@ EOF
 # Install all CPAN Modules, needed from FHEM and standard modules
 #
 
-FROM perl:5.36.3-threaded-bullseye AS build-cpan 
+FROM perl:5.38.0-threaded-bullseye@sha256:ee5a48a2d9dc34a2cdb8bf921be5ba3ab432802cc0cbd831cb23f956d3b47417 AS build-cpan 
 
 COPY cpanfile /usr/src/app/core/cpanfile